TinySystemInfo

A dependency free package that gathers just the absolute basic system metrics on Linux, macOS and Windows.

System Information Sources

OS	OS Info	CPU Usage	Memory	Volumes
Linux	cat /etc/os-release	cat /proc/stat 1	cat /proc/meminfo	df | grep -E '^/dev/(sd|vd|nvme|hd)'
macOS	sw_vers	top -l 2 -s 1 2	vm_stat, sysctl, pagesize 3	df -k /Volumes/*
Windows	System.Environment	PerformanceCounter 4	GlobalMemoryStatusEx()	DriveInfo.GetDrives()

[1] Linux CPU: Reads CPU tick counters from /proc/stat, takes two samples with a delay, and calculates the delta for accurate current CPU usage.

[2] macOS CPU: Uses top -l 2 -s 1 -n 0 | grep 'CPU usage' which provides two samples with 1 second interval. The second sample represents the actual CPU load during that interval (not the average since boot).

[3] macOS Memory: Combines multiple sources:

• sysctl -n hw.memsize for total physical memory
• vm_stat for virtual memory statistics (free, active, inactive, speculative pages)
• pagesize to get the memory page size (4096 or 16384 bytes on Apple Silicon)
• Free memory = (free + inactive + speculative) pages × page size

[4] Windows CPU: Uses PerformanceCounter("Processor", "% Processor Time", "_Total") with dual sampling (minimum 500ms delay) for accurate measurements.

Usage

Install TinySystemInfo from NuGet and simply call TinySystemReader.Read().

Hostname:           MacStudio
OS Architecture:    Arm64
OS Name:            macOS
OS Version:         26.0.1
CPU Count:          16
CPU Usage:          11,16 %
Memory Total:       128,00 GB
Memory Used:        57,11 GB
Memory Free:        70,89 GB
Memory Usage:       44,61 %
Volumes:
  /
    Total:          994,66 GB
    Used:           245,05 GB
    Free:           749,61 GB
    Usage:          24,64 %
  /Volumes/ExternalSsd
    Total:          2000,19 GB
    Used:           1320,43 GB
    Free:           679,76 GB
    Usage:          66,02 %

The app icon was made by Payungkead from Flaticon and is licensed by the Flaticon license.